RHSA-2026:51422: Important: Red Hat build of MicroShift 4.19.42 security update

- Issued: - 2026-08-12 - Updated: - 2026-08-12 RHSA-2026:51422 - Security Advisory Synopsis Important: Red Hat build of MicroShift 4.19.42 security update Type/Severity Security Advisory: Important Red Hat Lightspeed patch analysis Identify and remediate systems affected by this advisory. Topic Red Hat build of MicroShift release 4.19.42 is now available with updates to packages and images that include a security update. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. Description Red Hat build of MicroShift is Red Hat's light-weight Kubernetes orchestration solution designed for edge device deployments and is built from the edge capabilities of Red Hat OpenShift Container Platform. MicroShift is an application that is deployed on top of Red Hat Enterprise Linux devices at the edge, providing an efficient way to operate single-node clusters in these low-resource environments. This advisory contains the RPM packages for Red Hat build of MicroShift 4.19.42. Read the following advisory for the container images for this release: https://access.redhat.com/errata/RHSA-2026:51007 Security Fix(es): - Kubelet: CRI-O: kube-apiserver: Kubelet, CRI-O, kube-apiserver: Denial of Service via SPDY streaming code (CVE-2026-35469) All Red Hat build of MicroShift 4.19 users are advised to use these updated packages and images when they are available in the RPM repository. Solution For MicroShift 4.19, read the following documentation for important instructions on how to install the latest RPMs and fully apply this asynchronous errata update: Affected Products - Red Hat OpenShift Container Platform 4.19 for RHEL 9 x86_64 - Red Hat OpenShift Container Platform for Power 4.19 for RHEL 9 ppc64le - Red Hat OpenShift Container Platform for IBM Z and LinuxONE 4.19 for RHEL 9 s390x - Red Hat OpenShift Container Platform for ARM 64 4.19 for RHEL 9 aarch64 Fixes - BZ - 2457729 - CVE-2026-35469 Kubelet: CRI-O: kube-apiserver: Kubelet, CRI-O, kube-apiserver: Denial of Service via SPDY streaming code CVEs Red Hat OpenShift Container Platform 4.19 for RHEL 9 | SRPM | | |---|---| | microshift-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.src.rpm | SHA-256: 7f6a2f63a214c384e0a3f6ba3f6c04aa765fa91ba367cd9dcdbe904bd7c200bb | | x86_64 | | | microshift-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.x86_64.rpm | SHA-256: 0e6bc063c4dd908657eb9b20116ccb1e854aab5a9a918e5e36d0ca7b337f41f9 | | microshift-ai-model-serving-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.x86_64.rpm | SHA-256: 77057d430d0bd1a2974553edd9e893ce00fed4b11cc1496ec5a02b1eba4b5065 | | microshift-ai-model-serving-release-info-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.noarch.rpm | SHA-256: e9ac8c089eab3e6c4a9a8030414e9128c949187261dc5c7b80619a8c13aef47b | | microshift-gateway-api-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.x86_64.rpm | SHA-256: b73f272b0f8ef082a533b39a3fdf4c7d99c6caeae04c6deda8ab1e1e02610f41 | | microshift-gateway-api-release-info-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.noarch.rpm | SHA-256: a8f69238dd6c779cc6b33ede6392daed605ef5d1ba0b223eea1994298dd6f979 | | microshift-greenboot-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.noarch.rpm | SHA-256: 1cde362f96025c7cb155779d52fe2a8990641205d2abf7a9239e7df35a592991 | | microshift-low-latency-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.noarch.rpm | SHA-256: f14e3b7d46c94a8d02b69c2ac4199980d53a9b8c6e69d2254e84df5d96f4b8e4 | | microshift-multus-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.x86_64.rpm | SHA-256: 014cc244af6b7b1547ba19264986a17d90044da176bc6fe92f6080c9d87d7724 | | microshift-multus-release-info-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.noarch.rpm | SHA-256: d6d90ac7a353ccbdb2a3692bb1d2e8282bb1a2b8d2384ffb8ce97c5934f6f486 | | microshift-networking-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.x86_64.rpm | SHA-256: d1e9b1ec4ec0197b097f69464ed64f904673b931dd9f193d9c3d3859242ed9ad | | microshift-observability-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.noarch.rpm | SHA-256: f0fad6cc2c8e1075062523cca16ca1b5b415719219e168ca226b896b23b5740f | | microshift-olm-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.x86_64.rpm | SHA-256: fd9e62d7631ed16408438004aedb4255436befbec5547d7ef3a01f835b03dee6 | | microshift-olm-release-info-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.noarch.rpm | SHA-256: 6f2bb44e442dcb60ce182552a7ab3dabfd8a3e638cfbc4f24a699b3e177fa49b | | microshift-release-info-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.noarch.rpm | SHA-256: e274f8e4fc118231aca5bd6018fe2898e713e1426b150f54032071cbb5c39288 | | microshift-selinux-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.noarch.rpm | SHA-256: 6b147fea340b254f0a8b3e685d530b681a5ab306cba898e588ad6f4a561e919c | Red Hat OpenShift Container Platform for Power 4.19 for RHEL 9 | SRPM | | |---|---| | microshift-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.src.rpm | SHA-256: 7f6a2f63a214c384e0a3f6ba3f6c04aa765fa91ba367cd9dcdbe904bd7c200bb | | ppc64le | | | microshift-ai-model-serving-release-info-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.noarch.rpm | SHA-256: e9ac8c089eab3e6c4a9a8030414e9128c949187261dc5c7b80619a8c13aef47b | | microshift-gateway-api-release-info-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.noarch.rpm | SHA-256: a8f69238dd6c779cc6b33ede6392daed605ef5d1ba0b223eea1994298dd6f979 | | microshift-greenboot-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.noarch.rpm | SHA-256: 1cde362f96025c7cb155779d52fe2a8990641205d2abf7a9239e7df35a592991 | | microshift-low-latency-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.noarch.rpm | SHA-256: f14e3b7d46c94a8d02b69c2ac4199980d53a9b8c6e69d2254e84df5d96f4b8e4 | | microshift-multus-release-info-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.noarch.rpm | SHA-256: d6d90ac7a353ccbdb2a3692bb1d2e8282bb1a2b8d2384ffb8ce97c5934f6f486 | | microshift-observability-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.noarch.rpm | SHA-256: f0fad6cc2c8e1075062523cca16ca1b5b415719219e168ca226b896b23b5740f | | microshift-olm-release-info-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.noarch.rpm | SHA-256: 6f2bb44e442dcb60ce182552a7ab3dabfd8a3e638cfbc4f24a699b3e177fa49b | | microshift-release-info-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.noarch.rpm | SHA-256: e274f8e4fc118231aca5bd6018fe2898e713e1426b150f54032071cbb5c39288 | | microshift-selinux-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.noarch.rpm | SHA-256: 6b147fea340b254f0a8b3e685d530b681a5ab306cba898e588ad6f4a561e919c | Red Hat OpenShift Container Platform for IBM Z and LinuxONE 4.19 for RHEL 9 | SRPM | | |---|---| | microshift-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.src.rpm | SHA-256: 7f6a2f63a214c384e0a3f6ba3f6c04aa765fa91ba367cd9dcdbe904bd7c200bb | | s390x | | | microshift-ai-model-serving-release-info-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.noarch.rpm | SHA-256: e9ac8c089eab3e6c4a9a8030414e9128c949187261dc5c7b80619a8c13aef47b | | microshift-gateway-api-release-info-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.noarch.rpm | SHA-256: a8f69238dd6c779cc6b33ede6392daed605ef5d1ba0b223eea1994298dd6f979 | | microshift-greenboot-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.noarch.rpm | SHA-256: 1cde362f96025c7cb155779d52fe2a8990641205d2abf7a9239e7df35a592991 | | microshift-low-latency-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.noarch.rpm | SHA-256: f14e3b7d46c94a8d02b69c2ac4199980d53a9b8c6e69d2254e84df5d96f4b8e4 | | microshift-multus-release-info-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.noarch.rpm | SHA-256: d6d90ac7a353ccbdb2a3692bb1d2e8282bb1a2b8d2384ffb8ce97c5934f6f486 | | microshift-observability-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.noarch.rpm | SHA-256: f0fad6cc2c8e1075062523cca16ca1b5b415719219e168ca226b896b23b5740f | | microshift-olm-release-info-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.noarch.rpm | SHA-256: 6f2bb44e442dcb60ce182552a7ab3dabfd8a3e638cfbc4f24a699b3e177fa49b | | microshift-release-info-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.noarch.rpm | SHA-256: e274f8e4fc118231aca5bd6018fe2898e713e1426b150f54032071cbb5c39288 | | microshift-selinux-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.noarch.rpm | SHA-256: 6b147fea340b254f0a8b3e685d530b681a5ab306cba898e588ad6f4a561e919c | Red Hat OpenShift Container Platform for ARM 64 4.19 for RHEL 9 | SRPM | | |---|---| | microshift-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.src.rpm | SHA-256: 7f6a2f63a214c384e0a3f6ba3f6c04aa765fa91ba367cd9dcdbe904bd7c200bb | | aarch64 | | | microshift-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.aarch64.rpm | SHA-256: a977d9e5dc3dba5305387da3dc7cfb77969b2f4b98d573006fa743c287ca49c9 | | microshift-ai-model-serving-release-info-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.noarch.rpm | SHA-256: e9ac8c089eab3e6c4a9a8030414e9128c949187261dc5c7b80619a8c13aef47b | | microshift-gateway-api-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.aarch64.rpm | SHA-256: 4a2cbecdaa31b7715b035506fe974fa7fc1c69bb503a45a4fa19ec3ed220c9ad | | microshift-gateway-api-release-info-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.noarch.rpm | SHA-256: a8f69238dd6c779cc6b33ede6392daed605ef5d1ba0b223eea1994298dd6f979 | | microshift-greenboot-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.noarch.rpm | SHA-256: 1cde362f96025c7cb155779d52fe2a8990641205d2abf7a9239e7df35a592991 | | microshift-low-latency-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.noarch.rpm | SHA-256: f14e3b7d46c94a8d02b69c2ac4199980d53a9b8c6e69d2254e84df5d96f4b8e4 | | microshift-multus-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.aarch64.rpm | SHA-256: 36004e7cfe30c4175fa64b11292b0bf42ce094dfbe6aca75cd0aeeab4c35c7ed | | microshift-multus-release-info-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.noarch.rpm | SHA-256: d6d90ac7a353ccbdb2a3692bb1d2e8282bb1a2b8d2384ffb8ce97c5934f6f486 | | microshift-networking-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.aarch64.rpm | SHA-256: 5db3d0129594ccd3b4a2724037c874c42876f4712f767c6b0ff89c8388ac11d1 | | microshift-observability-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.noarch.rpm | SHA-256: f0fad6cc2c8e1075062523cca16ca1b5b415719219e168ca226b896b23b5740f | | microshift-olm-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.aarch64.rpm | SHA-256: 851e3cae97f2295c66043374faecadc3e70d3bbdd83959d13fb4be06e70027c8 | | microshift-olm-release-info-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.noarch.rpm | SHA-256: 6f2bb44e442dcb60ce182552a7ab3dabfd8a3e638cfbc4f24a699b3e177fa49b | | microshift-release-info-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.noarch.rpm | SHA-256: e274f8e4fc118231aca5bd6018fe2898e713e1426b150f54032071cbb5c39288 | | microshift-selinux-4.19.42-202608062155.p0.g46c9d67.assembly.4.19.42.el9.noarch.rpm | SHA-256: 6b147fea340b254f0a8b3e685d530b681a5ab306cba898e588ad6f4a561e919c | The Red Hat security contact is secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.